Mossner Rekord Ssf500 help needed

Hi everyone, I recently came into a nice vertical bandsaw, the price was right “free” so now it sits in my home shop. Upon inspection the only issue with the machine is with the band speed gauge. In its past the drive for the speedometer has sheared off and been lost to time. I tracked down a dealer in Alabama and after four calls, four messages and no returns I’m turning here for help.
I’ve disassembled the speedometer carefully and extracted the driveshaft. What I need now is someone who has the same saw to stick their hand up behind the tach works and snap a few photos, maybe measure the pulley. I know I can go other routes but I would like to try and have it working as is was new.
Any help would be greatly appreciated

Thanks
Christian